+++ /dev/null
-/*
- * arch/ubicom32/include/asm/thread.h
- * Ubicom32 architecture specific thread definitions.
- *
- * (C) Copyright 2009, Ubicom, Inc.
- *
- * This file is part of the Ubicom32 Linux Kernel Port.
- *
- * The Ubicom32 Linux Kernel Port is free software: you can redistribute
- * it and/or modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation, either version 2 of the
- * License, or (at your option) any later version.
- *
- * The Ubicom32 Linux Kernel Port is distributed in the hope that it
- * will be useful, but WITHOUT ANY WARRANTY; without even the implied
- * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
- * the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with the Ubicom32 Linux Kernel Port. If not,
- * see <http://www.gnu.org/licenses/>.
- *
- * Ubicom32 implementation derived from (with many thanks):
- * arch/m68knommu
- * arch/blackfin
- * arch/parisc
- */
-#ifndef _ASM_UBICOM32_THREAD_H
-#define _ASM_UBICOM32_THREAD_H
-
-#if !defined(__ASSEMBLY__)
-
-#include <asm/ptrace.h>
-#include <asm/ubicom32-common.h>
-
-typedef int thread_t;
-typedef unsigned char thread_type_t;
-typedef void (*thread_exec_fn_t)(void *arg);
-
-#define THREAD_NULL 0x40
-#define THREAD_TYPE_HRT (1 << 0)
-#define THREAD_TYPE_SPECIAL 0
-#define THREAD_TYPE_NORMAL 0
-#define THREAD_TYPE_BACKGROUND (1 << 1)
-
-/*
- * This is the upper bound on the maximum hardware threads that one will find
- * on a Ubicom processor. It is used to size per hardware thread data structures.
- */
-#define THREAD_ARCHITECTURAL_MAX 16
-
-/*
- * TODO: Rename this at some point to be thread_
- */
-extern unsigned int sw_ksp[THREAD_ARCHITECTURAL_MAX];
-
-
-/*
- * thread_get_self()
- */
-static inline thread_t thread_get_self(void)
-{
- thread_t result;
-
- /*
- * Note that ROSR has zeroes in bits 6 through 31 and so we don't need
- * to do any additional bit masking here.
- */
- asm (
- "lsr.4 %0, ROSR, #2 \n\t"
- : "=d" (result)
- :
- : "cc"
- );
-
- return result;
-}
-
-/*
- * thread_suspend()
- */
-static inline void thread_suspend(void)
-{
- asm volatile (
- "suspend\n\t"
- :
- :
- );
-}
-
-/*
- * thread_resume()
- */
-static inline void thread_resume(thread_t thread)
-{
- asm volatile (
- "move.4 MT_ACTIVE_SET, %0 \n\t"
- "pipe_flush 0 \n\t"
- "pipe_flush 0 \n\t"
- :
- : "d" (1 << thread)
- );
-}
-
-
-
-/*
- * thread_enable_mask()
- * Enable all threads in the mask.
- *
- * All writes to MT_EN must be protected by the MT_EN_LOCK bit
- */
-static inline void thread_enable_mask(unsigned int mask)
-{
- /*
- * must flush the pipeline twice.
- * first pipe_flush is to ensure write to MT_EN is completed
- * second one is to ensure any new instructions from
- * the targeted thread (the one being disabled), that
- * are issued while the write to MT_EN is being executed,
- * are completed.
- */
- UBICOM32_LOCK(MT_EN_LOCK_BIT);
- asm volatile (
- "or.4 MT_EN, MT_EN, %0 \n\t"
- "pipe_flush 0 \n\t"
- "pipe_flush 0 \n\t"
- :
- : "d" (mask)
- : "cc"
- );
- UBICOM32_UNLOCK(MT_EN_LOCK_BIT);
-}
-
-/*
- * thread_enable()
- */
-static inline void thread_enable(thread_t thread)
-{
- thread_enable_mask(1 << thread);
-}
-
-/*
- * thread_disable_mask()
- * Disable all threads in the mask.
- *
- * All writes to MT_EN must be protected by the MT_EN_LOCK bit
- */
-static inline void thread_disable_mask(unsigned int mask)
-{
- /*
- * must flush the pipeline twice.
- * first pipe_flush is to ensure write to MT_EN is completed
- * second one is to ensure any new instructions from
- * the targeted thread (the one being disabled), that
- * are issued while the write to MT_EN is being executed,
- * are completed.
- */
- UBICOM32_LOCK(MT_EN_LOCK_BIT);
- asm volatile (
- "and.4 MT_EN, MT_EN, %0 \n\t"
- "pipe_flush 0 \n\t"
- "pipe_flush 0 \n\t"
- :
- : "d" (~mask)
- : "cc"
- );
- UBICOM32_UNLOCK(MT_EN_LOCK_BIT);
-}
-
-/*
- * thread_disable()
- */
-static inline void thread_disable(thread_t thread)
-{
- thread_disable_mask(1 << thread);
-}
-
-/*
- * thread_disable_others()
- * Disable all other threads
- */
-static inline void thread_disable_others(void)
-{
- thread_t self = thread_get_self();
- thread_disable_mask(~(1 << self));
-}
-
-/*
- * thread_is_trapped()
- * Is the specified tid trapped?
- */
-static inline int thread_is_trapped(thread_t tid)
-{
- int thread_mask = (1 << tid);
- int trap_thread;
-
- asm (
- "move.4 %0, MT_TRAP \n\t"
- : "=d" (trap_thread)
- :
- );
- return (trap_thread & thread_mask);
-}
-
-/*
- * thread_is_enabled()
- * Is the specified tid enabled?
- */
-static inline int thread_is_enabled(thread_t tid)
-{
- int thread_mask = (1 << tid);
- int enabled_threads;
-
- asm (
- "move.4 %0, MT_EN \n\t"
- : "=d" (enabled_threads)
- :
- );
- return (enabled_threads & thread_mask);
-}
-
-/*
- * thread_get_instruction_count()
- */
-static inline unsigned int thread_get_instruction_count(void)
-{
- unsigned int result;
- asm (
- "move.4 %0, INST_CNT \n\t"
- : "=r" (result)
- );
- return result;
-}
-
-/*
- * thread_get_pc()
- * pc could point to a speculative and cancelled instruction unless thread is disabled
- */
-static inline void *thread_get_pc(thread_t thread)
-{
- void *result;
- asm (
- "move.4 csr, %1 \n\t"
- "setcsr_flush 0 \n\t"
- "move.4 %0, pc \n\t"
- "move.4 csr, #0 \n\t"
- "setcsr_flush 0 \n\t"
- : "=r" (result)
- : "r" ((thread << 9) | (1 << 8))
- );
- return result;
-}
-
-/*
- * thread_get_trap_cause()
- * This should be called only when the thread is not running
- */
-static inline unsigned int thread_get_trap_cause(thread_t thread)
-{
- unsigned int result;
- asm (
- "move.4 csr, %1 \n\t"
- "setcsr_flush 0 \n\t"
- "move.4 %0, trap_cause \n\t"
- "move.4 csr, #0 \n\t"
- "setcsr_flush 0 \n\t"
- : "=r" (result)
- : "r" ((thread << 9) | (1 << 8))
- );
- return result;
-}
-
-/*
- * THREAD_STALL macro.
- */
-#define THREAD_STALL \
- asm volatile ( \
- "move.4 mt_dbg_active_clr, #-1 \n\t" \
- "pipe_flush 0 \n\t" \
- : \
- : \
- )
-
-extern unsigned int thread_get_mainline(void);
-extern void thread_set_mainline(thread_t tid);
-extern thread_t thread_alloc(void);
-extern thread_t thread_start(thread_t thread, thread_exec_fn_t exec, void *arg, unsigned int *sp_high, thread_type_t type);
-
-/*
- * asm macros
- */
-asm (
-/*
- * thread_get_self
- * Read and shift the current thread into reg
- *
- * Note that we don't need to mask the result as bits 6 through 31 of the
- * ROSR are zeroes.
- */
-".macro thread_get_self reg \n\t"
-" lsr.4 \\reg, ROSR, #2 \n\t"
-".endm \n\t"
-
-/*
- * thread_get_self_mask
- * Read and shift the current thread mask into reg
- */
-".macro thread_get_self_mask reg \n\t"
-" lsr.4 \\reg, ROSR, #2 \n\t"
-" lsl.4 \\reg, #1, \\reg \n\t" /* Thread bit */
-".endm \n\t"
-);
-
-#else /* __ASSEMBLY__ */
-
-#include <asm/thread-asm.h>
-
-#endif /* __ASSEMBLY__ */
-#endif /* _ASM_UBICOM32_THREAD_H */
projects / openwrt / svn-archive / archive.git / blobdiff